package pl.wroc.pwr.docs.repos.webapp.web;

import java.io.IOException;

import javax.servlet.DispatcherType;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@WebFilter(urlPatterns = "/*", dispatcherTypes = DispatcherType.REQUEST)
public class SessionFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		HttpSession session = ((HttpServletRequest) request).getSession(true);
		
		if(session.getAttribute("messages") == null){
			session.setAttribute("messages", new MessageQueue());
		}

		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
	}
}